What instrument is used to mix amalgam and capsule cement?

The amalgamator is the correct choice because it is specifically designed for mixing dental materials, such as amalgam and capsule cement. This instrument utilizes a mechanical mixing process, which ensures that the components of the amalgam or cement are thoroughly combined, creating a homogenous mixture that is essential for optimal performance and handling when placed in a cavity or for further dental procedures.

In the context of dental procedures, achieving the correct consistency and proper mixing of materials is crucial for the effectiveness of the dental restoration. The amalgamator automates this process, allowing for consistent results while reducing the risk of air bubbles or incomplete mixing which could compromise the integrity of the material used.

Other instruments listed do not serve the same function. A cement applicator is used solely for applying cement, not for mixing. The surgical aspirating tip is designed for suction during surgical procedures and has no role in mixing materials. Lastly, a scalpel is a cutting instrument used in surgical procedures, unrelated to the mixing of dental materials.